Maybe TPHD was planned for a summer release (they said in February that it will be announced soon) and Nintendo wasn't satisfied with the quality.
Tantalus/Straight Right also did the ZombiU port.
Maybe Nintendo delayed it to spring to make it a 30th anniversary game and to have a spring game. That was probably before the Star Fox Zero delay...
Or the game that they were working on since early 2014 wasn't TPHD and got cancelled. I remember that it was supposed to be a third-party game according to the interview, but maybe it was a misunderstanding.
I really think that a 2015 release of Zelda Wii U was planned in 2014. That would have been the big holiday game.








